I _______ have been more than six years old when the accident happened．

We hope that as many people as possible        join us for the picnic tomorrow.

I have told you the truth. ________ I keep repeating it?

You can not imagine that a well-behaved gentleman _______be so rude to a lady.

I wonder how he _______ that to the teacher.

The fans never expected their favourite team, which owns so many excellent players, ________have been defeated in the first round!

One of our rules is that every student       wear school uniform while at school.

According to the rules, students ______ get grades not lower than 85% in any subject in order to get the scholarship.

—A medical team was sent to Japan by air five hours ago.
—So they ______________ have arrived by now. The flight usually takes four hours or so.

Walking exercises ____ be boring at times, but on a clear sunny morning nothing could be better．